Need advice on job

I was recently hired for a .2 art teacher position. It is one period a day
that rotates from 11am to 2pm, 40 minutes long. For the first couple of
months I will need to be in three different rooms during a 7 day schedule due
to renovations. I was told that to suppliment my permanent income, I could
substitute at that school and the one adjacent to it.

Today I received an offer for a full-time teacher's aid in a high school
resource room. The salary is fair and is based hourly with plenty of time to
pick up a side job if necessary. This job has art potential (unsure about
specifics at this time), full benefits, and is a stable position.